Technical data

MODBUS Functions • 159
MODBUS Register Mapping
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
6.4 MODBUS Register Mapping
The following tables display the MODBUS register mapping for the process
image, the PFC variables, the NOVRAM data, and the internal variables is
represented.
Register (Word) Access Reading:
Start address End
address
Memory range
0x0000 0x00FF physical Inputs process image (1)
0x0100 0x01FF Output registers of the PFC variables (MODBUS TCP)
0x0200 0x02FF physical Outputs process image (1)
0x0300 0x03FF Input registers of the PFC variables (MODBUS TCP)
0x1000 0x2FFF Internal variables (see next Chapter 6.5)
0x3000 0x5FFF NOVRAM (24 kByte) Retain range for flags
0x6000 0x62FC physical Inputs process image (2)
0x7000 0x72FC physical Outputs process image (2)
Register (Word) Access Writing:
Start address End
address
Memory range
0x0000 0x00FF physical Outputs process image (1)
0x0100 0x01FF Input registers of the PFC variables (MODBUS TCP)
0x0200 0x02FF physical Outputs process image (1)
0x0300 0x03FF Output registers of the PFC variables (MODBUS TCP)
0x1000 0x2FFF Internal variables (see next Chapter 6.5)
0x3000 0x5FFF NOVRAM (24 kByte) Retain range for flags
0x6000 0x62FC physical Outputs process image (2)
0x7000 0x72FC physical Outputs process image (2)